REVISION OF PEORIINAE AND ANERASTIINAE 39 



Paratypes: Two males, both Clyde (Bryan Co.), Georgia, Sept. 

 11-12, 1931, Bradley and Knorr; C.U. Type No. 4404; one male 

 genitalia slide No. 439, J. Shaffer, Mar. 25, 1965. 



Other specimens examined. — None. 



Distribution (Map 4). — Probably the Atlantic Coastal Plain; 

 known only from Georgia and Virginia, 



Arivaca, new genus 



Type. — Poujadia pimella Dyar, 1906. 



Diagnosis. — Males of this genus may be recognized by the com- 

 bination of (a) the gnathos bearing a bulbous or padlike medial 

 process, and (b) each spicate process of the uncus having a short 

 posterior and a much longer anterior sharp-pointed spine (figs. 

 119-125). 



Description. — Frons conical, one-half to three-quarter times as 

 long as eye diameter; labial palpi porrect; maxiUary palpi very small; 

 tongue poorly developed; antennae with scape compressed, male 

 shaft with basal segments fused, female shaft filiform, scaled dorsally 

 and laterally, finely ciliate ventrally, somewhat compressed; eye 

 diameter about 0.2 mm gi-eater in male than in female; oceUi normal. 



Forewings with 10 or 11 veins; Ri from well before upper outer 

 angle of cell; II3+4 stalked; Mi from the angle; M2+3 stalked or fused, 

 from lower outer angle; Cui from just before the angle; Cu2 from 

 well before the angle. Hind^^dngs with 6 or 7 veins; Sc and Rs approxi- 

 mate or connate on basal half; Mi from upper outer angle of cell; 

 M2 absent; Ms+Cui free, stalked, or fused, from lower outer angle; 

 Cu2 from before the angle. 



Male genitalia ^\^th spicate processes of uncus flat, each bearing 

 short sharp posterior and long tapering anterior thorns. Gnathos 

 arms straplike, bearing anteromedial projection; medial process 

 bulbous or padlike. Vinculum broadly rounded. Aedeagus flattened, 

 vesica bearing pair of cornuti. 



Female genitaha \\dth ductus biu-sae flattened, rather long, well 

 sclerotized. Bursa smaU, hghtly sclerotized. Ductus seminahs from 

 posterior half of ductus bursae. 



Discussion. — The seven species of Arivaca faU into foiu- rather 

 distinct subunits herein distinguished as species groups rather than 

 as genera or subgenera. Because the genus is apparently best devel- 

 loped in the unstudied region south of the United States, it is possible 

 that intermediate forms exist between the species groups, and it is 

 felt best not to give the groups nomenclatural status. 



